spaCy/spacy/cli/download.py
2018-05-07 23:02:11 +02:00

105 lines
3.9 KiB
Python

# coding: utf8
from __future__ import unicode_literals
import plac
import os
import subprocess
import sys
import ujson
from .link import link
from ._messages import Messages
from ..util import prints, get_package_path
from ..compat import url_read, HTTPError
from .. import about
@plac.annotations(
model=("model to download, shortcut or name)", "positional", None, str),
direct=("force direct download. Needs model name with version and won't "
"perform compatibility check", "flag", "d", bool),
insecure=("insecure mode - disables the verification of certificates",
"flag", "i", bool),
ca_file=("specify a certificate authority file to use for certificates "
"validation. Ignored if --insecure is used", "option", "c"))
def download(model, direct=False, insecure=False, ca_file=None):
"""
Download compatible model from default download path using pip. Model
can be shortcut, model name or, if --direct flag is set, full model name
with version.
The --insecure optional flag can be used to disable ssl verification
The --ca-file option can be used to provide a local CA file
used for certificate verification.
"""
# ssl_verify is the argument handled to the 'verify' parameter
# of requests package. It must be either None, a boolean,
# or a string containing the path to CA file
ssl_verify = None
if insecure:
ca_file = None
ssl_verify = False
else:
if ca_file is not None:
ssl_verify = ca_file
# Download the model
if direct:
dl = download_model('{m}/{m}.tar.gz'.format(m=model))
else:
shortcuts = get_json(about.__shortcuts__, "available shortcuts", ssl_verify)
model_name = shortcuts.get(model, model)
compatibility = get_compatibility(ssl_verify)
version = get_version(model_name, compatibility)
dl = download_model('{m}-{v}/{m}-{v}.tar.gz'.format(m=model_name,
v=version))
if dl != 0: # if download subprocess doesn't return 0, exit
sys.exit(dl)
try:
# Get package path here because link uses
# pip.get_installed_distributions() to check if model is a
# package, which fails if model was just installed via
# subprocess
package_path = get_package_path(model_name)
link(model_name, model, force=True, model_path=package_path)
except:
# Dirty, but since spacy.download and the auto-linking is
# mostly a convenience wrapper, it's best to show a success
# message and loading instructions, even if linking fails.
prints(Messages.M001.format(name=model_name), title=Messages.M002)
def get_json(url, desc, ssl_verify):
try:
data = url_read(url, verify=ssl_verify)
except HTTPError as e:
prints(Messages.M004.format(desc, about.__version__),
title=Messages.M003.format(e.code, e.reason), exits=1)
return ujson.loads(data)
def get_compatibility(ssl_verify):
version = about.__version__
version = version.rsplit('.dev', 1)[0]
comp_table = get_json(about.__compatibility__, "compatibility table", ssl_verify)
comp = comp_table['spacy']
if version not in comp:
prints(Messages.M006.format(version=version), title=Messages.M005,
exits=1)
return comp[version]
def get_version(model, comp):
model = model.rsplit('.dev', 1)[0]
if model not in comp:
prints(Messages.M007.format(name=model, version=about.__version__),
title=Messages.M005, exits=1)
return comp[model][0]
def download_model(filename):
download_url = about.__download_url__ + '/' + filename
return subprocess.call(
[sys.executable, '-m', 'pip', 'install', '--no-cache-dir', '--no-deps',
download_url], env=os.environ.copy())